SaveFileDialog保存对话框

SaveFileDialog saveFileDialog1 = new SaveFileDialog();

            saveFileDialog1.AddExtension = true;

            saveFileDialog1.Filter = "ACCESS 2003(*.mdb)|*.mdb|所有文件|*.*"; //文件类型

            saveFileDialog1.Title = "数据库另存为";//标题

            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {

                string fileName = saveFileDialog1.FileName;

                string pathFile = "c://ere.txt"; //指定文件

                File.Copy(pathFile, fileName, true); //复制

                MessageBox.Show("备份成功！");

            }

            else
            {

                MessageBox.Show("操作已取消！");

            }

      作用是将制定的文件（c://ere.txt）保存备份为其它的名称的文件